No Cura or Slic3r options in Slice Engines available

I'm having an issue with wierd slicing so I wanted to try the other engines. I have V. 1.4 on this laptop, and the only slicer I see in the dropdown is Matterslice. I see Cura and SLic3r engines in the Mattercontrol folder, but they're not available in program.

Win 7. I see the slicer engines in the MC folder but not in the dropdown. I havent' updated my other computer from 1.2 so it doesn't catch this in case it's a version issue. I see nothing where I can add them manually.

The menu seems to be machine dependent.If I add another printer (tried with a Xfrog Creator) and choose it the menu will display other slicer engines.

But I don't have a Xfrog machine but an old BitsFromBytes which isn't a preset when adding new printer.So I must choose "Other" brand and "Other" model name.With such a printer configuration the only slicer available is Matterslice.